Wheels on skis for transportation

ABSTRACT

The invention relates to a device for manually transporting by rolling or sliding, pushing or pulling, skis or the like as a pair, on any kind of surfaces, with a pair of independent collapsible wheels, each wheel attached to a different ski from the pair, the wheels can be folded and deployed, enabling safe skiing when the wheels are folded and carrying the ski upon the ground with the assistance of the wheels, when they are deployed and the skis attached together as a pair. The device is permanently mounted on the ski. The wheels are made from light material, such as rubber or plastics. The ski can also have a holder or fastener at the opposite end for fixing a pulling or pushing aid.

0. OBJECT AND/OR DOMAIN OF THE INVENTION

The present invention generally relates to the field of skiing. Moreparticularly, the present invention relates to a device for an easytransportation of the ski on any kind of surface.

1. BRIEF DESCRIPTION OF THE INVENTION

The invention relates to a device for carrying provided for movement onany kind of surfaces to help the locomotion (for manually transportingby rolling or sliding, pushing or pulling, any pair of skis withouteffort) intended pairwise together, board-like means of transport, inparticular skis or the like, with a pair of collapsible wheels, whichcan be folded and deployed, enabling safe skiing when the wheels arefolded and carrying the ski upon the ground with the assistance of thewheels, when they are deployed and with another ski connected to it.

The device is mounted on each upper surface of the tail end of two skisor on the front end of the ski that allows the skis to be transportedwhen the bottom (or the top) of the skis is adjacent to the ground.

2. BACKGROUND OF THE INVENTION

In many ski site around the world, skiers are forced to walk longdistances when practicing their sport, for example when traveling thedistance between their departure place to the ski slopes, in which themeans of transportation have to be slipped off and transportedseparately. Either they travel by train, thus they have to carry the skifrom home to the ski resort and then on the ski domain itself to the skislopes. Either skiers travel to ski area by automobile or by bus. Thus,most ski areas provide large parking lots at the base area.Unfortunately, skiers must still transport their equipment from theparking lot areas to the bottom of the ski lift. The distance, in bothcases, is usually substantial and is aggravated by other factors.

For that walk, they have to carry their heavy skis by hand or on theirshoulders, that requires a huge effort, in particular for children. Thephysical effort involved in this context has increased in recent yearsdue to the again heavier equipment rather. It also requires a hugeeffort considering the walking with heavy confining ski boots,especially for children. In addition, skis transported on the shoulders,for example, pose a considerable risk of injury for both the personcarrying and also those in their environment due to their weight andtheir swiveling range (bulky, painful and dangerous for others).

The skis typically must be held together as a unit in order to handlethem with any ease at all. Small children particularly suffer, when theyare required to handle the heavy load by themselves, they can be seentrudging along, the skis often separate from each other and “escape” tothe sides.

The traditional mode of transportation (as wearing skis on the shoulder)may dirty or damage the skier's outfit.

Skiing implies a considerable number of elements, such as skis, poles,gloves, cap, sunglass, etc. Adding an additional element to alreadyimportant number of ski elements is not convenient for skiers. Any newdevice has to be considered also in a price perspective, since skiingrequire quite a budget, such device should be affordable.

Finally, the design and integrity of the skis are an important concernof skiers, as a matter of fact they are not willing to harm their skis,even in order to ease their transportation. The skier does not want tobuy a special ski manufactured with a device that eases itstransportation.

The device should be addable on any pair of skis, without hurting itsdesign or integrity and with a reasonable cost even if a professional isinvolved in fixing it to the ski tales.

A possible solution to reduce the effort required to carry skis is todivide the weight load of the skis between the skier's body and theground by permanently adding light wheels at the end of the pair of ski.Our invention tends to remedy all those drawbacks.

3. TECHNICAL FIELD

There are already been various transporting devices, that have beenpatented, which attempt to solve or to reduce the effort required tocarry the skis, that are classified under AC63/11.

The first group of patents has attempted to provide an additionalremovable device, which has to be inserted in the end of the assembledskis for transport (examples: U.S. Pat. Nos. 4,968,060, 9,656,611 orDE2650077 A1), usually called “Caddy”.

The second group of patents are semi-removable devices, as for exampleU.S. Pat. No. 4,792,159A.

The third group of patents imagined are fully integrated to the ski, butharms the ski design: under the patents DE 10 2005 021 494 A1, BE1017343and A6 US2009309320 A1.

4. DRAWBACKS

As seen, different types of device already exist, which attempt to solvethe above problems and thus lessen the skier's burden. In practice, theyare not used because of their inherent drawbacks, such as the devicesmust each time be mounted and subsequently disassembled before takeninto a pocket of clothing.

The first group of devices indicated previously are in this respectconsidered to be disadvantageous, as they are either unwieldy, bulky,difficult to install and tedious to store during skiing, that may makethe skier's outfit or bag dirty. The major disadvantage of this kind ofsolution is the need to unpack the skis from the equipment carrier andfind a temporary storage solution for the equipment carrier or ratherfor the skier to carry it while skiing. None saying that skiers have tothink of taking it with them, next to many other items indispensable totake with while skiing (as the gloves, helmet, the poles, etc.).

The second group of devices (listed above) generally also suffer fromdrawbacks because they do not allow for an easy storage, they usuallyhave bulky fixed wheel bases, and enlarged structural parts that wouldbe heavy to carry, bulky to store and expensive to manufacture. Nonesaying that skiers have to think of taking it with them, next to manyother items indispensable to take with while skiing.

The third group suffers also from disadvantages, most of them harms theintegrity of the ski tale itself and creates some serious imbalanceissues (ski weight's balanced). More specifically, the patent A6US2009309320 A1 is very bulky and heavy. Since it is fixed only on oneski (not on each ski tale), it might generate imbalances while skiing.The devices, under patents BE1017343 and DE 102005021494 A1, aredisadvantageous because it changes the shape of the ski (that mightimply imbalance) and harms its design. Since it injuries the ski itself,it means either buy a special ski already manufactured with that deviceor that the skier must ask a professional to add the present deviceprobably at a high cost (whether it can be added later on normal skis isalso questionable). Furthermore, the position of skis does not providefor a comfortable transportation, since the skier has to grab thebiggest part of the ski tale.

There is thus a widely-recognized need for, and it would be highlyadvantageous to have a device, that enables reducing the load ofcarrying skis without having any significant effect on the pleasure andperformance of the skier.

4.1. Technical Issues

The goal of the present invention is to develop a device to help skiertransporting their skis from their departure's place to the ski slopeswithout effort and without having to take an additional device thatwould be complicated to store. The solution according to the presentinvention to the problem described above is providing a compactcollapsible wheel device which can be assembled to different kind ofskis. The object of the invention is to definitively incorporate a verylight wheel on each spatula (either on the front or the back end of theskis).

This solution enables carrying the skis with their weight carriedpartially by the ground, and afterwards folding the device and using theskis for skiing, with the device carried on each one of the skis.

It has the following advantages: integrated to the ski (not anadditional device to think of taking with or to stow while skiing; noneed of mounting and dismounting the device), small and light device,that does not create imbalance neither harm the ski itself or its design(can be added later on a pair of skis—no need to buy the special skiwith the device already manufactured on it), easy to use/user friendlyand allows for a safe handling to the means of transport during skiing.

Since the device is permanently mounted on the ski, the device'smaterial has to be light in order to assure that the ski keeps itsweight balanced.

4.2. Solution

This objective is achieved by a device provided as an integral part ofthe ski and that the wheel in the end of the region of the ski spatula(or on the front). By arranging the device on the means oftransportation itself, there is no more effort to carry the device. Theinvention allows the skier to easily transport their skis, withoutmounting and dismounting or storing a device in a pocket.

This invention is permanently mounted on each of the ski spatula, in alocation provided in the end region of the ski.

According to the embodiment of the present invention, collapsible wheeldevice is integrated to the top surface of each tale of a pair of skis,in a manner that is definitive (preventing them from being separated).Namely, it is possible to ski with the device connected to the skis, andthe skis can be stored with it.

The pair of skis, gathered by ski-stop, are held together as a unitproviding for a paired means of locomotion, the collapsible wheel deviceon each ski works together as the skis are assembled. The two skis'tales are fastened together by the brakes, an elastic band or a scratchband can also be added in order to strengthen the grip, achieving asingle unit that will not come apart during the transportation of theskis.

The invention has a pair of spaced apart wheels that are independentlyconnected to the ski so that the wheels define a spaced wheelbase(conferring a better stability) when the skis are placed in a parallelrelationship to each other, the skis are in between the wheels whentransporting.

According to the embodiment of the present invention, the device isconnected directly to each of the rear part of a pair of skis (that canalso be the rear curved end of the skis). Two collapsible wheel devicesare necessarily mounted on each ski tale. Each device includes a uniquewheel.

The collapsible wheel device has two modes: a closed mode suitable forskiing, and an open mode suitable for transportation. The wheel can befolded and deployed: i) enabling safe skiing when the wheels are folded(closed mode), and ii) carrying the ski upon the ground (open mode) withthe assistance of the wheels, when the wheels of the two skis aredeployed. Opening and deploying the wheel can be done with a simpleknob. A lock is a possible development in order to secure the knob inboth of these modes.

Transporting the pair of skis is done with the ski equipped with thedevice turned perpendicularly to the ground, namely the thinner slice ofthe skis facing the ground and the upper surface of the ski face upward.

According to particular embodiments: bearing can be produced by a wheelmounted on an axle that is connected either to a receptacle or a rail.The wheel axle is interlocked with the receptacle or the slots of therail directly on the skis.

The wheel axle is connected to either the receptacle or the railpermanently fixed (for example by the means of a super glue, preferablynot by stews in order to avoid any harm or damage of the integrity ofthe ski) on the spatula of the ski. The receptacle or the rail is fixedon the rear of the ski spatula.

The wheel is mounted on an axle (and turns on it), that is connectedeither to a receptacle or a rail. In order to get its open mode(transporting position), the wheel can either deployed itself on astable receptacle by unfolding or inflating, or by sliding on rail totake its “transporting position”.

4.3. Advantages

The advantage of the present invention is that it helps skiertransporting their skis from their departure's place to the ski slopeswithout effort and without having to take an additional device thatwould be complicated to store.

The skier does not suffer any gene from the device while skiing both onthe slots and in deep snow, thanks to a low weight and a fluid shapethat is adapted to the geometry of the spatula. The mass of the deviceis chosen in such a way that the vibratory modes of the ski are notnegatively influenced.

5. BRIEF DESCRIPTION OF THE DRAWINGS The invention is exposed in moredetailed with the help of the following drawings:

FIG. 1: of the prior art illustrates the collapsible wheel device in anopen mode (deployed), which are supported by a person's hand on oneside;

FIG. 2: is a view from an above perspective of a collapsible wheeldevice in closed mode (folded);

FIG. 3: is a side view of the collapsible wheel device with a railembodiment;

FIG. 4: is a view of the collapsible wheel device with a receptacleembodiment; 4 a) in a closed mode (folded) and 4 b) in the open mode(deployed), allowing for a broader space wheelbase;

FIG. 5: is a view of the different wheel embodiments; 5 a) basic wheelmatching with the rail embodiment; 5 b) an inflating wheel correspondingto the receptacle embodiment; 5 c) a foldable wheel matching with areceptacle embodiment.

6. DETAILED DESCRIPTION OF EMBODIMENTS

The principles and operation of skis equipped with a collapsible wheeldevice according to the present invention may be better understood withreference to the drawings and the accompanying description.

Before explaining at least one embodiment of the invention in detail, itis to be understood that the invention is not limited in its applicationto the details of construction and the arrangement of the components setforth in the following description or illustrated in the drawings. Theinvention is capable of other embodiments or of being practiced orcarried out in various ways.

Also, it is to be understood that the phraseology and terminologyemployed herein is for the purpose of description and should not beregarded as limiting. Unless otherwise defined, all technical andscientific terms used herein have the same meaning as commonlyunderstood by one of ordinary skill in the art to which this inventionbelongs. The materials, dimension, methods, and examples provided hereinare illustrative only and are not intended to be limiting.

The following is a list of legends of the numbering of the applicationillustration:

-   1) ski equipped with a collapsible wheel device-   2) ski upper surface-   3) ski thinner slice-   4) collapsible wheel device: 4 a) deployed mode, 4 b) folded mode-   5) wheel: 5 a) basic wheel, 5 b) inflating wheel, 5 c) foldable    wheel-   6) rail 6 a) or receptacle 6 b)-   7) axle-   8) collapsible wheel release knob

Referring to the drawings, FIG. 1 is perspective view schematicillustration of the first exemplary embodiment of skis equipped with thedevice n. 1, according to the present invention.

In FIG. 1, it should be thus understood that the skis n. 1, as shown arein a positioned assembled together and held as a unit. This is a commonposition for skis during transportation wherein the bottoms are affixedtogether so that the ski bindings and the ski tops are exposed. A pairof skis gathered by ski-stop, that can even be secured by a simpleelastic.

The transportation assure that the ski's tales do not get damaged, sinceonly the thinner side n. 3 of the ski might get contact with the ground.

The skis equipped with collapsible wheel device n. 1 includes three mainassemblies: a ski, which can be a standard ski, which is connected tothe ski upper surface n. 2 by means of strong adhesive (as super orthermic-resistant glue) [ideally not with screws in order to safeguardthe integrity of the ski], or any other suitable means, and the devicen. 4. This connection is definitive and strong in order to become anintegral part of the ski.

It is even possible that the ski n. 1 is manufactured with the rail n. 6a) or a receptacle n. 6 b) as an integral part. The receptacle n. 6 b)is provided as a fixed part of the upper surface of the means oftransport n. 2 (ideally arranged in the end region of the means oftransport) such that the means of locomotion n. 1 can be rolled on theground.

The collapsible wheel device n. 4 is fixedly connected to the means oftransport n. 2 and remains during use of the means of transportation,but does not interfere with the locomotion itself n. 4 b).

The device n. 1 should be assembled as close as possible either to thefront or to the bottom of the ski, with a preference to the bottom ofthe ski since the ski bottom surface are typically flat and unobstructedwhile the ski tops typically carry bindings.

The present invention includes a rail n. 6 a) or a receptacle body n. 6b) of preferably plastic construction using, but can also be machinedfrom metal such as stainless steel, for example. A pair of receptaclebodies n. 6 b) attaches respectively to the upper surfaces of the ski n.2. The rail n. 6 a) or receptacle n. 6 b) can be arranged on the skiupper surface n. 2 either by professional or by individuals themselveswith the help of a stencil (adapted to the different ski shape that isapt to keep the cost low).

The wheel n. 5 is assembled to the rail n. 6 a) or the receptacle n. 6b) by the means of the axle n. 7. The collapsible wheel device n. 4 canonly be removed with special products (such as solvent), due to theirmechanical structures to secure its assembly during skiing, as will bedescribed in the following.

FIG. 3 is a schematic illustration of the first embodiment of the railn. 6 a) and the axle n. 7 and the wheel n. 5. FIG. 3 shows that the axlen. 7 of the first exemplary embodiment is composed of two tubes, whichare compatible to each other in size and shape. The elastic device innertube can move lengthwise within the elastic device outer tube. Withinthe elastic device outer tube, there is disposed a spring, which isdesignated to assist in going from closed mode, which is suitable forskiing, to open mode, which is suitable for carrying after deployment ofwheel 5.

FIG. 4 is a schematic illustration of the second embodiment of thereceptacle n. 6 b) and the axle n. 7 and the wheel n. 5. According tothe present invention, the close mode (folded mode) is illustrated byFIG. 4a and the open mode (deployed mode) is illustrated by FIG. 4b .The collapsible wheel device n. 4 includes either a rail n. 6 a) or areceptacle n. 6 b) and an axle n. 7, with release knob n. 8) disposed atits middle part.

The receptacle n. 6 b) is connected to the ski upper surface n.) bymeans of strong adhesive (such as super or thermic-resistant glue), orany other suitable means [ideally not with screws in order to safeguardthe integrity of the ski].

Connection of the rail n. 6 a) or the receptacle n. 6 b) to the wheel n.5) is achieved by an axle n. 7). The wheel n. 5) is rotably mounted uponits stub axles n. 7). The axle n. 7) supports the wheel n. 5), which canbe, for example, of a rubber construction.

They are also locked by means of release knob n. 8, which makes“non-voluntary” separation impossible.

The structural materials of the collapsible wheel device n. 4 and thewheel n. 5 should have qualities that ensure a high strength to weightratio, such as rigid plastic materials (plastic pad having a highabrasion resistance and a low coefficient of friction, such as Teflonfor example), suitable metals, and silicon, with optional combination ofseveral different structural materials, according to the embodiment ofthe wheel n. 5.

The skier does not suffer any gene from the collapsible wheel device n.4 while skiing both on the slopes and in deep snow, thanks to a lowweight and a fluid shape that is adapted to the geometry of the spatulaor the curved back tip ski. The mass of the device is chosen in such away that the vibratory modes of the ski are not negatively influenced.

Finally, a development of the device in which the wheels n. 5 are madeof a rubber, a plastic or similar material, which roll relativelysmoothly on the particular floor and which, for example, mayadditionally be coated or star wheel to prevent buildup of snow.

The dimension of the collapsible wheel device n. 4 and the wheel n. 5)can vary greatly to comply to the size of any ski.

While the wheel n. 5 is blocked in the folded mode n. 4 b), the fulldevice remains on the middle of the upper surface of the ski n. 2, sucha position in which the wheel is blocked by the knob at this position.

FIG. 4a shows that by providing a not too large distance to the uppersurface of the ski n. 2 (in closed mode n. 4 b), the accumulation ofsnow adhering to the wheel can be avoided.

The deployed (open) mode n. 4 a) can be achieved by pressing releaseknob n. 8, which is disposed in the center of the wheel n. 5.

Wheel release knob n. 8, according to the first exemplary embodiment,releases the wheel on the rail n. 6 a) to change its position (frompoint a to point b) with a single pressure. The wheel n. 5 a) slides onthe rail n. 6 a) to attain its deployed mode (open mode) n. 4 a), so thedistance between the middle of the ski tale (horizontal) and theextremity of it decrease, granting the access to the floor to the wheel.

According to another exemplary embodiment FIG. 5b , the collapsiblewheel device n. 4, the wheel n. 5 still has a release knob n. 8 andpressing to it implies an inflation of the wheel n. 5 b). Accordingly,the wheel deploys itself (similar to an aircraft safe jacket) andextends its surface.

According to another exemplary embodiment FIG. 5c , the collapsiblewheel device n. 4, the wheel n. 5 still has one lock release button n. 8and pressing to it implies that the foldable wheel n. 5 c) collapsesfrom half to full.

When the skis are placed in a parallel relationship to each other bondby the brakes form a unit and the two wheels are independently deployedon each tales, the invention is composed of a pair of spaced apartwheels, so that the wheels define a spaced wheelbase, the skis are inbetween the wheels when transporting. In the open mode n. 4 a) thewheels n. 5 move away from the ski tale and the space between the twowheels increases allowing for a better stability.

The device n. 4 adapts itself in an appropriate manner to differentlandscape and weather-related conditions, but also, for example,different body sizes of the transporting person, because of inclination,so that the wheel n. 5 with respect to the top of the sports equipmentcan take different positions.

Because many varying and different embodiments may be made within thescope of the inventive concept herein taught, and because manymodification may be made in the embodiment of the law, it is to beunderstood that the details herein are to be interpreted as illustrativeand not in a limiting sense.

7. POSSIBLE DEVELOPMENTS OF THE INVENTION

An expedient development of the device may consist either of a connectedbutton, of a led wheel or of guiding means.

The lock button can also be connected, as for example with GPS.

The wheel can be lighted (for example by leds) when folded, helpingother skiers to identify that specific skier especially in fog.

In order to transport the means of transport in the form of skis withoutfatigue over long distances, a pulling or guiding means can be arranged,for example the skis equipped with the collapsible wheel device can alsouse a tangling or snagging counteracting guide. The distance to thetransporting person is variably adjustable over the length of thispulling or guiding means. In this way, skis can be conveniently pulledover the shoulder of the person carrying it on the side on such atrained approximately in the manner of a rope or tape train or guidemeans.

1. Device for manually transporting, board like locomotion means, inparticular of skis pairwise together or like, characterized in that itis composed of a pair of wheels which are an integral part of each skitales.
 2. Device for transporting on any kind of surfaces providedpairwise together, board-like locomotion means, in particular of skis,when gathered by the ski-stops, or the like, with at least onecollapsible wheel device on the upper surface of each ski tale, which inan area of the tips of the means of travel, centered in the width of thetale, characterized in that the device is permanently mounted on the skito form an integral part of the means of transport, and that the devicein the tail end region of the means of transport such that the side ofthe tales facing the bottom when the wheels are deployed.
 3. Accordingto claim 1, the device is carried respectively and independently by eachseparate ski at the tail end portion (either on the tips or on the endof the ski tale) and on said upper surface of each said ski. 4.According to claim 1, the device is characterized in that the wholedevice is permanently integrated on each upper surface of the ski tale;the receptacles or rails are strongly and definitively fixed on themeans of transportation and that the wheels are permanently attached toit by the axle; when the user is skiing, the wheels are in a foldedmode; when the user is transporting the ski, the wheels are in adeployed position.
 5. According to claims 1 and 2, characterized thatthe ski equipped with the device, which it is composed of three mainpieces that are kept attached directly on the ski, characterized asnon-removable device. Wherein the three pieces: the wheel connected tothe axle, that is itself connected to either the receptacle or railstrongly fixed to the ski (with glue or other means alike).
 6. Accordingto previous claim, the device comprises: (a) either a rail or areceptacle (depending on the alternative embodiment chosen) disposed onupper surface of each ski; wherein the receptacle or the rail, that hasa predetermined shape and dimensions, includes a slot that receives anaxle for rotably holding each wheel; and (b) each axle has a flanged endportion that can be engage in the slot on the said rail or receptacleand mounted in the center of the wheel; and (c) a wheel is mounted onthe said axle, itself arranged on the rail or receptacle forming part ofthe ski; wherein a pair of wheels are non-removable and each wheel isindependent of the other wheel. (d) a knob means at the center of thewheel allowing to change position of the wheel from the folded mode tothe deployed position and vice-versa.
 7. According to the previousclaims, the device is characterized in that it comprises the wheel, axleand the receptacle or rail, that are kept permanently attached on themeans of transportation by means of super glue or alike (without causingany damage to the ski tale itself).
 8. Device according to the previousclaim, characterized in that the receptacle or the rail is disposed onthe upper surface of the ski.
 9. According to the precedent claim, thedevice is characterized in that the rail allows the axle and the wheelto move from position A (closed mode) to position B (open mode) in orderfor the wheel to exceeds over the substantial part of the ski tale'swidth.
 10. According to an alternative claim, the device ischaracterized in that a static receptacle, allow the wheel to inflate inorder to achieve its open (deployed) mode; and the wheel deflate inorder to get to its closed mode; whereas no movement on the uppersurface of the ski is necessary to exceed over the substantial part ofthe ski tale's width in the open mode, since the wheel inflates enoughto exceed in an appropriate measure over the side of the ski taleallowing for transportation.
 11. According to an alternative claim, thedevice is characterized in that a static receptacle, allow the wheel tounfold in order to achieve its open (deployed) mode; and the wheel isfolded in order to get to its closed mode; whereas no movement on theupper surface of the ski is necessary to exceed over the substantialpart of the ski tale's width in the open mode, since the unfolded partof the wheel exceed in an appropriate measure over the side of the skitale allowing for transportation.
 12. In order to be of no disturbancewhile skiing, the wheels have to reduce in size, to fold or to move fromits open (deployed) position (B) to its closed (folded) position (A).The position (A) can be archived either by deflating the wheel(receptacle mode), by folding the wheel (receptacle mode), by reducingextendable wheels (receptacle mode), by moving the wheel on the slot ofthe rail (rail mode).
 13. According to the previous claims, the deviceis characterized in that the device has a weight that influences aslittle as possible the initial ski weight and cleans vibration modes ofthe ski. According to preceding claims, the device is characterized inthat it is made of material light enough to assure that the weightdistribution of the ski is not modified (and that when the device is infolded mode the ski's balance is ensured), for example the device ismade in plastic having a high abrasion resistance and a low coefficientof friction.
 14. An alternative, if a slight imbalance still occurs(even with light materials), is to add an equivalent weight on theopposite end of the ski in order to rebalance the ski—by means ofdecorative piece or useful add (as GPS for example).
 15. Deviceaccording to one of the preceding claims is characterized in that thereceptacle or the rail and the axle are formed from a light, but solid,material like light and strong alloy with aluminum or carbon forexample, in order to assure in the folded mode no interference in thebalance weight of the ski.
 16. Device according to one of the precedingclaims is characterized in that the wheel is formed from a lightmaterial like rubber or plastic, in order to ensure stability andbalance of the ski itself.
 17. Device according to one of the precedingclaims is characterized in that the wheel allows to roll on roughsurfaces, by profiled tire or like.
 18. According to previous claims,the device is characterized in that the collapsible wheel can be folded(closed mode) or deployed (opening mode). The skis equipped with a pairof collapsible wheel device of claim 1, wherein said collapsible wheelfurther includes a lock release knob, mounted at the center of the wheeland the axle, for enabling the release of said collapsible wheel fromits close position to its open position (the wheel exceeding oversubstantially on the side of the ski) and vice-versa (from close mode toopen mode).
 19. Apparatus according to previous claims is characterizedin that the wheel (4) deploys on the side of the ski and exceeds overthe substantial part of its width in order to allow the ski'stransportation and therefore guarantees that the ski tales do not getdamaged, since the deployed wheel exceed from ski tale width (on thethinner side of the ski) and only the wheel gets contact with theground.
 20. According to the previous claim, the device is characterizedin that a pair of space apart wheels on one end of the ski tale providesthat skier can grab the opposite end portion of the ski tale in order totransport the skis; and allow transport by pulling or pushing the skipairwise together on any kind of surfaces.
 21. According to thepreceding claims, the device is characterized in that a pair of spacedapart wheels that are independently connected to each ski's tale so thatthe wheels define a spaced wheelbase when the skis are placed in aparallel relationship to each other allowing a better transportation.The wheelbase can be broadened by means of a spring in the axle. 22.Device according to one of previous claims is characterized in that theski tales have to be gathered by the ski-stops, that can also be securedby a simple elastic or band.
 23. Device according to one of thepreceding claims, characterized in that a holder, a pulling or guidingmeans can be arranged on the ski itself in order to ease thetransportation, for example on the ski-stops.